// Copyright (C) 2023 Huawei Device Co., Ltd.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/// Hitrace adapter which provides timing capability.
///
/// The timing will end automatically when the structure drops. Users should
/// take care that the lifetime of this structure.
pub(crate) struct Trace;

impl Trace {
    // Copies from `Hitrace`.
    const HITRACE_TAG_MISC: u64 = 1u64 << 41;

    /// Starts tracing.
    pub(crate) fn new(value: &str) -> Self {
        hitrace_meter_rust::start_trace(Self::HITRACE_TAG_MISC, value);
        Self
    }
}

impl Drop for Trace {
    /// Stops tracing.
    fn drop(&mut self) {
        hitrace_meter_rust::finish_trace(Self::HITRACE_TAG_MISC);
    }
}
